Troops established a road block on the frontier.
士兵在边界上设了路障。
I've hit a bit of a road block in my research as I'm not grasping these relations and ideas.
我已经打了一下路障在我的研究,我没有把握这些关系和想法。
If you can practice this, then you'll always have a backup in case the conversation hits a road block.
如果你能不断的练习,那么当谈话不顺利的时候,你总能够接下话题。
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